As evident from the performance of India on economic front during 2005-06 it can be very well concluded that India did excellent in all sectors except one which is:

Agriculture sector is correct. During 2005-06, India performed well in banking, industry, and services sectors, but agriculture was the weak link with slower growth. The agricultural sector grew at only around 2-3% during this period, lagging behind the broader 8-9% GDP growth, largely due to monsoon failures and stagnating productivity.