Which statement about the RPF interface in a BIDIR-PIM network is true?
A. In a BIDIR-PIM network, the RPF interface is always the interface that is used to reach the PIM rendezvous point.
B. In a BIDIR-PIM network, the RPF interface can be the interface that is used to reach the PIM rendezvous point or the interface that is used to reach the source.
C. In a BIDIR-PIM network, the RPF interface is always the interface that is used to reach the source.
D. There is no RPF interface concept in BIDIR-PIM networks.
PIM bidirectional has no RPF check
https://networklessons.com/multicast/multicast-bidirectional-pim
https://cciethebeginning.wordpress.com/2008/07/24/bidirectional-pim-bidir-pim/ would suggest D