If L stands for $+$, M stands for $-$, N stands for $\times $, P stands for $\div $, then 14 N 10 L 42 P 2 M 80 =?
(a) 153
(b) 81
(c) 105
(d) 103

Hint: In this question, we will first substitute all the alphabet symbols with the mathematical operation they represent and then apply the BODMAS rule to solve it.

Complete step-by-step answer:
Here, in given question, English alphabets are used as a symbol in place of mathematical operations as given below:
L represents addition, that is $+$,
M represents subtraction, that is $-$,
N represents multiplication, that is $\times $,
P represents division, that is $\div $.
For example, 2 L 3 will mean 2 + 3.
Also, according to the BODMAS rule, while evaluating any given expression in mathematics, order of preference is: Bracket, Of, Division, Multiplication, Addition, Subtraction.
Now, the given expression is,
14 N 10 L 42 P 2 M 80
Changing alphabets to mathematical operations, we get,
\[14\times 10+42\div 2-80\]
Using BODMAS rule, we will first do division, so dividing 42 by 2, we get,
\[14\times 10+21-80\]
Second operation here according to BODMAS rule is multiplication, so multiplying 14 by 10, we get,
$140+21-80$
third operation here according to BODMAS rule is addition, so adding 140 with 21, we get,
$161-80$
Now subtracting 161 by 80, we get,
\[81\].
Hence, the value of the given expression is 81.
Therefore, the correct answer is option (b).

Note: In this type of questions, do not get confused by the alphabets between the numbers in an expression, it is just a BODMAS rule problem and alphabets are added to check your aptitude knowledge.