A black hole is a ________
A. Contracted star with intense gravitational pull
B. Star with very low surface temperature
C. Star with no atmosphere
D. Pulsating star

Messenger satellite has been launched by NASA for the study of
A. Mercury
B. Venus
C. Saturn
D. Jupiter

Deriving pleasure from inflicting pain on others
A. Sadism
B. Malevolence
C. Bigotry
D. Masochism