In a ∆ABC, the equation of the side BC is 2x – y = 3 and its circumcentre and orthocentre are at (2, 4) and (1, 2), respectively.

**1. Circumradius of ∆ABC is**

**(a) **√(61/5)

(b) √(51/5)

(c) √(41/5)

(d) √(43/5)

**2. sinB sinC is equal to**

**(a) 9/2**√61

(b) 9/4√61

(c) 9/√61

(d) 9/3√61

** 3. The distance of orthocentre of vertex A is**

(a) 1/√5

(b) 6/√5

(c) 3/√5

(d) 2/√5