Questions

Sunspots are a magnetic phenomenon on the Sun.

The reason a sunspot appears dark is that they are cooler than the rest of the Sun's surface and also the gas inside the spot where the magnetic field is strongest is only emitting about 1/4 as much light as from the rest of the solar surface. 

All   are   correct   except   D,   as Mangifera  indica  is  scientific  name of Mango

The Parliament has the power to regulate the right of citizenship in India.

Protective arrangements: Such measures as are required to enforce equality, to provide punitive measures for transgressions, to eliminate established practices that perpetuate inequities, etc.A number of laws were enacted to implement the provisions in the Constitution. Examples of such laws include The Untouchability Practices Act, 1955, Scheduled Casteand Scheduled Tribe (Prevention of Atrocities) Act, 1989, The Employment of Manual Scavengers and Construction of Dry Latrines (Prohibition) Act, 1993, etc. Despite legislation, social discrimination and atrocities against the backward castes continued topersist

Dr Kailasavadivoo Sivanis an Indian space scientist and the chairperson of theIndian Space Research Organization.He is the former Director ofVikram Sarabhai Space Centerand Liquid Propulsion centre.He is joinedthis position Jan2018.