[30." If for some "alpha" and "beta" in ...

[30." If for some "alpha" and "beta" in "R" ,the intersection of the "],[" following three planes "],[x+4y-2z=1,x+7y-5z=beta],[x+5y+cz=5],[" is a line in "R^(3)," then "alpha+beta" is equal to "],[[" (a) "0," (b) "10," (c) "-10," (d) "2],[," [JEE Main 2020,"9" January Shift-1] "],[" Exp.(b) "]]

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