Which of the following is valid syntax for if else statement...

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Which of the following is valid syntax for if else statement in R?

if(<condition>) {
          ## do something
}
else {
          ## do something else
}

if(<condition>) {
          ## do something
}
elseif {
          ## do something else
}

if(<condition>) {
          ## do something
}
else if {
          ## do something else
}

if(<condition>) {
          ##& do something
}
else {
          ##@ do something else
}

Answer: Option A

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