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Let C be the circle in the complex plane with centre z 0 = 2 1 (1 + 3i) and radius r =1. Let z 1 = 1 + i and the complex number z 2 be outside circle C such that . 1 z z z z 0 2 0 1    If z 0 , z 1 and z 2 are collinear, then the smaller value of |z 2 | 2 is equal to

1. 2 5
2. 2 7
3. 2 13
4. 2 3

Correct answer: 2 5

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