Tuning fork F1 has a frequency of 256 Hz and it is observed to produce 6 beats/second with another tuning fork F2. When F2 is loaded with wax, it still produces 6 beats/second with F1. The frequency of F2 before loading was

(1) 253 Hz

(2) 262 Hz

(3) 250 Hz

(4) 259 Hz

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