Determine the number of s-orbitals that can overlap with the vacant p-orbital in the following ions:
(i) tert-butyl cation
(ii) n-pentyl cation 
(iii) sec-pentyl cation 

• A. (i) 3 (ii) 3 (iii) 6
• B. (i) 6 (ii) 6 (iii) 9
• C. (i) 5 (ii) 5 (iii) 8
• D. (i) 4 (ii) 4 (iii) 6

Answer: (A)