In IGMPV1, there is no formal process for electing a querier router (the election depends on the multicast routing protocol used). In IGMPv2, a querie

Hi simon.waweru,
The answer is A.
Each network segment can have only one querier, which is elected by multicast devices on the network segment. The election rules are as follows:

After IGMP is enabled on a router (Router A), during the IGMP startup process, Router A considers itself to be the querier for the network segment it resides on, and sends IGMP Query messages to other routers on the network segment. If Router A receives an IGMP Query message from a router (Router B) with a smaller IP address, Router A changes into a non-querier, starts the Other Querier Present Timer, and records Router B as the querier of the network segment.

If a non-querier (Router A) receives an IGMP Query message from the querier (Router B), Router A updates the Other Querier Present Timer. If Router A receives an IGMP Query message from another router (Router C) with a smaller IP address than the querier, Router A changes its local querier setting to Router C and updates the Other Querier Present Timer.

If the Other Querier Present Timer expires when Router A is in the non-querier state, Router A changes to the querier state and functions as the querier.