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How many triangles are there in the given figure?

a

23

b

19

c

17

d

15

Answer : Option D
Explanation :

The rectangles are :

ABKJ; BNEK; JKLM; KEFG; ABGM; BNFG; ANEJ;

JEFM; BCDE; BEGJ; JGHI; CDGJ; CDHI; BEHI;

ANFM

Thus, there are 15 rectangles in the given figure.

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