‘R’ will be the first part of the given sequence as the possessive pronoun ‘his’ is used in the context of ‘Phatik’ in S1. ‘Q’ will come next because ‘She’ is used in relation of ‘his mother’ in R. ‘P’ will come next as it talks about the Phatik uncle’s offer after observing his mother’s worries for his education. ‘S’ will pair with S6 as it says they both talk about the result of taking him to Kolkata for further education, that is, Phatik became a sober, industrious and a distinguished scholar. Hence, RQPS is the right sequence. Thus, option (d) is correct.