`triangle ABC ~ triangle QRP` and PQ = 6cm, QR = 8cm and PR = 10cm. If `ar(triangle ABC) :ar(triangle QRP)` = 1 : 4 , then AB is equal to :
`triangle ABC ~ triangle QRP` है और PQ = 6cm, QR = 8cm तथा PR = 10cm है । यदि `ar(triangle ABC) :ar(triangle QRP)` = 1 : 4 है, तो AB ज्ञात करें |

Options

A. 2 cm
B. 5 cm
C. 3 cm
D. 4 cm