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Let A = { – 3, – 2, – 1, 0, 1, 2, 3} and R be a relation on A defined by xRy if and only if 2x – y  {0, 1}. Let l be the number of elements in R. Let m and n be the minimum number of elements required to be added in R to make it reflexive and symmetric relations, respectively. Then l + m + n is equal to:

1. 18
2. 15
3. 17
4. 16

Correct answer: 17

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