Chemistry Question from JEE Main 2025 · 4 April, Shift 2

A metal complex with a formula $MCl_4( NH_3)_3$ is involved in $sp^3d^2$ hybridisation. It upon reaction with excess of AgNO$3$ solution gives ‘$x$’ moles of AgCl. Consider ‘$x$’ is equal to the number of lone pairs of electron present in central atom of BrF$5$. Then the number of geometrical isomers exhibited by the complex is _____