P’s father’s father is the husband of Q’s mother’s mother. How is P related to Q?

Pointing to a baby girl in the cradle, Sripad said, "She is the daughter of my father's mother's only daughter's elder daughter".

 How is the baby girl's mother related to Sripad?

U is the father of M. V is the Wife of K. D is the mother of K's only brother M. How is U related to D?

If $\mathrm{P}+\mathrm{Q}$ means $\mathrm{P}$ is the father of $\mathrm{Q}$,

$\mathrm{P}\times \mathrm{Q}$ means $\mathrm{P}$ is the Brother of $\mathrm{Q}$, 

$\mathrm{P}-\mathrm{Q}$ means $\mathrm{P}$ is the mother of $\mathrm{Q}$,

then which of the following is definitely true about the statement $\mathrm{C}-\mathrm{A}+\mathrm{B}$?