The angle between two vector \[\overrightarrow{A}\And \overrightarrow{B}\] is \[\theta \]. vector \[\overrightarrow{R}\] is the resultant of vectors \[\overrightarrow{A}\And \overrightarrow{B},\] if \[\overrightarrow{R}\] makes an angle \[\frac{\theta }{2}\] with \[\overrightarrow{A}\] then

• A. A = 2B
• B. A = B/2
• C. A = B
• D. AB = 1