Choose the word(s) which can correctly replace the word(s) printed in italic bold in the sentence without changing the meaning of it.
Your master will like you if you are diligent.
‘Diligent’ means hard-working or being careful and serious in work. So, the best fit as the meaning of the word is Option D ‘hard working’ which also means who works with full energy and commitment. Option A ‘conscientious’ means accurate or dedicated. Option B ‘obedient’ means willing to comply with one’s order. Option C ‘meticulous’ means careful and accurate. Hence, the best fit option is ‘hard-working’, Option D.