It is an important issue why India has selected more spinners and three pacers. Condition of Sri Lanka weather would play a big role. Supporting bowlers in each sectors is important which causes to select Ishant Sharma and S. Sreesanth. At the same time Lankan condition suppose to be favorable for the spinners Amit Mishra, P.Ojha and Harbhajan Singh.
Ishant and Sreesanth, part of India's last Test squad, have gone through pretty ordinary times in limited-overs cricket since then, both in the IPL and while playing for India. More so because none of the alternatives tried in their absence have impressed enough. And Ashish Nehra is not willing to play Tests, while Praveen Kumar is strictly a limited-overs bowler.
Seniors have got extra priority to junior that is why Dravid, Sachin Tendulkar and V.V.S. Laxman have been included in the squad instead of Dinesh Karthik and Bardrinath.
India Squad for Sri Lanka tour: Mahendra Singh Dhoni (Captain & WK, Batsman), Virender Sehwag (Vice-Captain, Batsman and Spinner), Sachin Tendulkar (Batsman), Suresh Raina (Batsman and bowler), Wrindham Saha (batsman and WK), Gautam Gambhir (Batsman), Rahul Dravid (Batsnam), VVS Laxman (Batsman), Yuvraj Singh (left-handed spinner and batsman), Murali Vijay, Harbhajan Singh, Amit Mishra, Pragyan Ojha, Zaheer Khan, Ishant Sharma, S Sreesanth.