The parliamentary constituencies where voting took place were Vidisha, Dewas, Ujjain, Indore, Dhar, Ratlam, Mandsaur, Khargone, Khandwa and Betul.
In Vidisha, the Bharatiya Janata Party's Leader of Opposition in the Lok Sabha, Sushma Swaraj, is pitted against Congress candidate Lakshman Singh, the younger brother of Congress general secretary Digvijaya Singh.
For the Indore seat, the BJP has fielded Sumitra Mahajan who is contesting against Satyanarayan Patel of the Congress and Anil Trivedi of the Aam Aadmi Party.
Other prominent candidates include former Union minister and Congress leader Kantilal Bhuriya in Ratlam and Congress candidate Meenakshi Natarajan in Mandsaur.
A 48-year-old booth level officer at Harda under the Betul constituency died of a heart attack when he was on his way to the booth from his native Kamardha village on Thursday morning. Nine electronic voting machines were changed following glitches.
This was the third and final round of polling in the state. The first two phases saw voting in 19 constituencies. Of the 10 constituencies where voting is being held Thursday, the Congress had won six in the 2009 Lok Sabha elections.