Which of the phrase given below should replace the phrase printed in bold to make the sentence grammatically correct.
He is addicted to smoke.
Five friends A, B, C, D, and E are sitting in a row facing north, but not necessarily in the same order:
B is to the immediate left of C
E is not at any of the ends
D is to the right of E but not next to C
A is at one of the ends
Who is sitting in the middle?
How many triangles are there in the figure given below? 