What is the meaning of the idiom 'to follow your nose'?

The term 'en route' means—

(a) The idiom 'going south' refers to _______

(b) British Bengalis are _______ important part of ______ Bangladeshi diaspora who are living abroad.

(Use appropriate articles in the gaps.)

(c) What is the adjective of "patriot"?

(d) What does the phrase "Sine Die" mean?

(e) Pick the correct sentence:

(i) I owe to you

(ii) I am owing to you

(iii) I owe you

(iv) I owe at you