Answer :
I believe the answer is Two
Total valence electrons is 8
Ca -- S (-- is single bond) this needs 6 more electrons as a single bond is only 2 electrons
So you put 3 lone pairs on each atom but this makes it so there are 14 electrons
Take 2 lone pairs off of both atoms so each Atom only has 1 Lone pair
The 4 lone pairs you took off of the atoms become a triple bond between Ca and S.
This leaves you with 10 Electrons which is 2 too many but Octet should be filled over valency
Now you have Ca =- S (=- is triple bond) and you have one lone pair on each atom which gives you two total lone pairs
Total valence electrons is 8
Ca -- S (-- is single bond) this needs 6 more electrons as a single bond is only 2 electrons
So you put 3 lone pairs on each atom but this makes it so there are 14 electrons
Take 2 lone pairs off of both atoms so each Atom only has 1 Lone pair
The 4 lone pairs you took off of the atoms become a triple bond between Ca and S.
This leaves you with 10 Electrons which is 2 too many but Octet should be filled over valency
Now you have Ca =- S (=- is triple bond) and you have one lone pair on each atom which gives you two total lone pairs