Fill in the blank with the appropriate word.
The man was charged with __________ after murdering the king.

Correct option is B

The correct option to fill in the blank is (b) regicide.
Regicide means the act of killing a king. (राजा की हत्या)
Example: He was arrested for regicide after leading the revolt.
Explanation of other options:
· (a) Homicide – killing of a human being (हत्या)
· (c) Matricide – killing of one's mother (माँ की हत्या)
· (d) Genocide – mass killing of a particular group (जातीय नरसंहार)