Article 19(1)(b) of the Constitution guarantees citizens the right to:

assemble peaceably and without arms

The article identifies Article 19(1)(b) as the right to assemble peaceably and without arms. A is Article 19(1)(a). C is Article 19(1)(c). D is Article 19(1)(d); each is a distinct freedom. A is incorrect: freedom of speech does not satisfy the stated fact or is a different institution/concept. C is incorrect: form associations does not satisfy the stated fact or is a different institution/concept. D is incorrect: move freely throughout India does not satisfy the stated fact or is a different institution/concept.