The time period of a satellite of earth is $5$ hours. If the separation between the earth and the satellite is increased to $4$ times the previous value, the new time period will become

• A

  $10 \mathrm{hrs}$
• B

  $80 \mathrm{hrs}$
• Correct answer
  C

  $40 \mathrm{hrs}$
• D

  $20 \mathrm{hrs}$

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