The correct answer is (a) under Section 511 IPC.
Section 511 of the Indian Penal Code (IPC) states that whoever attempts to commit an offence punishable with death, or with imprisonment for life, or with imprisonment for a term which may extend to ten years, shall be punished with imprisonment of either description for a term which may extend to seven years, or with fine, or with both.
Section 509 IPC deals with the offence of word, gesture or act intended to insult the modesty of a woman. The punishment for this offence is imprisonment of either description for a term which may extend to five years, or with fine, or with both.
Section 510 IPC deals with the offence of criminal intimidation. The punishment for this offence is imprisonment of either description for a term which may extend to two years, or with fine, or with both.
Section 507 IPC deals with the offence of criminal intimidation by an anonymous communication. The punishment for this offence is imprisonment of either description for a term which may extend to two years, or with fine, or with both.
In the given question, the offence that is being attempted is punishable with imprisonment for life or other imprisonment. Therefore, the punishment for attempting to commit this offence is provided under Section 511 IPC.