Direction: Given here are six parts of a sentence. S1 and S6 are the first and the last part, respectively. The rest of the parts, namely a, b, c and d are jumbled. Select the option that gives their correct order.

S1: Shakespeare is known as

a. to a black lady

b. and his friend;

c. the bard of avon;

d. his sonnets are addressed

S6: whose source is still unknown to many.