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If in triangle PQR, angle P = 120^@, PS ...

If in `triangle PQR, angle P = 120^@, PS bot QR` at S and PQ+QS=SR, then the measure of `angle Q` is:
यदि त्रिभुज PQR में, `angle P = 120^@`, S पर `PS bot QR` और PQ+QS=SR है, तो कोण Q का मान ज्ञात करें |

A

`20^@`

B

`50^@`

C

`40^@`

D

`30^@`

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