Among hindus, members of the lowest caste are commonly referred to by the term dalit, which means
a. "despised."
b. "oppressed."
c. "segregated."
d. "disadvantaged."

Dalit means "oppressed" (option b).
the origin of the word is in Marathi, and it's what they call themselves. By others they are called "untouchables"/

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Amath expression is a collection of one or more terms, which are separated by the signs ( + , - , x , / ).example :   8+b8+b  or  a−3a−3in algebra, an equation is a mathematical statement with two expressions where, each expression is separated by an equal (=) sign. variables can be present on both the sides of the equality (=) sign and we use letters to denote such variables.example 1:   x=4+2x=4+2  , [here, we can observe that the variable is present only on one side of the equation].example 2:   2x+3=x+42x+3=x+4  , [here, we can observe that the variables are present on both side of the equation].