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Correct option is C)

$β5aβ5b=a+b$

$β4a=6b$Β

$β4a=6b$Β

$βbaβ=23β$ i.e. $3aβ=2bβ=k$

Therefore, $a_{2}+b_{2}a_{2}βb_{2}β=9k_{2}+4k_{2}9k_{2}β4k_{2}β=135β$

Ths the required ratio is $5:13$.

Therefore, $a_{2}+b_{2}a_{2}βb_{2}β=9k_{2}+4k_{2}9k_{2}β4k_{2}β=135β$

Ths the required ratio is $5:13$.

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