Which among the following is the special feature that distinguishes a pressure group from a political party?

Which among the following is the special feature that distinguishes a pressure group from a political party?
(a) Parties take political stances, while pressure groups do not bother about political issues.
(b) Pressure groups are confined to a few people, while parties involve larger number of people.
© Pressure groups do not seek to get into power, while political parties do.
(d) Pressure groups do not seek to mobilise people, while parties do.

© Pressure groups do not seek to get into power, while political parties do.