Give below are two statements: One is labelled as Assertion \(\mathrm{A}\) and the other is labelled as Reason R: Assertion A: The stability order of +1 oxidation state of Ga, In and T1 is \(\mathrm{Ga} < \mathrm{In} < \) T1. Reason R: The inert pair effect stabilizes the lower oxidation state down the group. In the light of the above statements, choose the correct answer from the options given below:

• A

  \(\mathrm{A}\) is true but \(\mathrm{R}\) is false.
• B

  \(\mathrm{A}\) is false but \(\mathrm{R}\) is true.
• Correct answer
  C

  Both \(\mathrm{A}\) and \(\mathrm{R}\) are true and \(\mathrm{R}\) is the correct explanation of \(\mathrm{A}\).
• D

  Both \(\mathrm{A}\) and \(\mathrm{R}\) are true but \(\mathrm{R}\) is NOT the correct explanation of \(\mathrm{A}\).

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