SSC MTS 2 Aug 2019 Shift 3 Paper

Correct option: 3) respectable - this is the most suitable option.
As per the context of the sentence we need an adjective here and 'respectable' is the only appropriate option.
Receptive - able or inclined to receive ( in-appropriate as per the context of the sentence )
Respective - PARTICULAR, SEPARATE ( in-appropriate as per the context of the sentence )
Respectable - worthy of respect : ESTIMABLE ( most appropriate )
Responsible - liable to be called on to answer
Hence, option 3 is the most appropriate option.