SBS shows Raziya accusing Dilshad of black magic- (the dialogues are there, though neither Tamatar nor Dilshad is actually present there!)which she knows is NOT TRUE! So when she is sitting and accusing Dilshad, as her daughter has fainted, she knows her daughter is fine, as she herself added a sedative in the sweet!
Or else, it is a combined plan between Tanveer and Raziya.
SBB did not show the slap.
Did SBS show that?
If Surbhi said Tanveer poisoned the sweet, it is most likely not!