Option (a) is correct.

Explanation:

• The sounding rocket mission, named the Integral Field Ultraviolet Spectroscope Experiment (INFUSE) was launched from the White Sands Missile Range in New Mexico by the National Aeronautics and Space Administration (NASA).
• It aims to study a stellar event in the Cygnus Loop, which is a supernova remnant that took place 20,000 years ago.

Option (d) is correct.

Explanation:

• The Sixth Assembly of the International Solar Alliance (ISA) was hosted at Bharat Mandapam, in New Delhi.
• ISA was established following the Paris Declaration at the UN Climate Change Conference on November 30, 2015.
• It aims to form a coalition of solar resource-rich countries to collaborate on addressing the identified gaps in their energy requirements through a common approach.
• Statement 1 is correct: The ISA has set a target of 1 TW of solar energy by 2030, which would require $1 trillion to achieve.
• Statement 2 is correct:The United Nations General Assembly granted observer status to the ISA on 9 December 2021. 
• The Assembly of the ISA is the apex decision-making body which comprises representatives from each Member Nations.

Option (a) is correct

Explanation:

• India and Bangladesh launched three India-assisted development projects, two of which are expected to boost trade and improve connectivity with the Northeastern states.
  • The three projects are the Akhaura- Agartala Cross-Border Rail Link,  Khulna-Mongla Port Rail Line; and Unit 2 of the Maitree Super Thermal Power Plant.

Option (c) is correct

Explanation: 

• The Organisation for Economic Co-operation and Development (OECD) developed a model to tax digital services companies uniformly around the globe. However, implementing this global tax deal system comes with its own challenges.
• The tax mechanism serves the dispute around digital taxation in two pillars. 
• Statement 1 is correct: Pillar one will re-allocate some taxing rights over Multinational Enterprises(MNEs) from their home countries to the markets where they have business activities and earn profits, regardless of whether firms have a physical presence there.  
• Statement 2 is correct: Pillar Two introduces a global minimum corporate tax rate set at 15%.  
• Statement 3 is correct: It requires countries to remove all digital service tax­es, like India’s equalisation levy and other similar measures, and give a com­m­it­ment not to introduce such measures in the future.

Option (a) is correct

Explanation: 

• Demand for work under the Mahatma Gandhi National Rural Employment Guarantee Scheme (MGNREGS) continued to remain robust despite a seasonal slowdown in the month of October.
• Statement 1 is not correct: It provides a legal guarantee for one hundred days of employment in every financial year to adult member of any rural household willing to do public work-related unskilled manual work at the statutory minimum wage. 
• Statement 2 is correct: The Ministry of Rural Development (MRD) is responsible for implementation of this scheme in association with state governments.
• Statement 3 is correct: Within 15 days of submitting the application or from the day work is demanded, wage employment will be provided to the applicant.
• Statement 4 is correct: Social Audit of MGNREGA works is mandatory under the scheme.