My opinion in the photo given here shows the Floor Crossing which falls under Article 70 of Bangladesh Constitution.

The article has the effect of preventing free votes and crossing the floor by Members of Parliament. If MPs vote against their party, they automatically lose their seats. As a result of Article 70, Bangladesh's parliament has largely served as a rubber stamp for actions taken by the ruling party or coalition.

Article 70-

A person elected as a member of parliament at an election at he was nominated as a candidate by a political party shall vacate his seat if he-

a) resign from that party,

b) votes in parliament against that party.