The equation of a transverse wave propagating along a stretched string of length 80 cm is $\mathrm{y}=1.5 \sin \left\{\left(5 \times 10^{-3} \mathrm{x}\right)+20 \mathrm{t}\right\}$, here ' x ' and ' y ' are in cm and the time ' t ' is in second. If the mass of the string is 3 g, then the tension in the string is

• Correct answer
  A

  12 N
• B

  4 N
• C

  6 N
• D

  8 N

Hence, the correct answer is option: 'A'.