A particle moving with velocity \( \vec{v} \) is acted by three for...

A particle moving with velocity \( \vec{v} \) is acted by three forces shown by the vector triangle \( P Q R \). The velocity
of the particle will
(a) change according to the smallest force \( \overrightarrow{Q R} \)
(b) increase
(c) decrease
(d) remain constant
(NEET 2019)