String handling operations in a programming language

Easy

The subroutine EXTRACT_SUB extracts characters from a given string.

For example, EXTRACT_SUB(3, 7, 'CHROMOSOME') would return 'OMOSO'.

A sequence analysis program makes the following variable assignments:

sample_a ← 'CYTOSINE'
sample_b ← 'NUCLEOTIDE'
sample_c ← 'POLYMERASE'
sample_d ← 'CHROMOSOME'

The variable result is assigned a value using the statement:

result←EXTRACT_SUB(4,8,sample_b) \text{result} \leftarrow \text{EXTRACT\_SUB}(4, 8, \text{sample\_b})

What is the value of result?

$’LEOTI’\text{'LEOTI'}$

$’EOTI’\text{'EOTI'}$

$’EOTID’\text{'EOTID'}$

$’OTIDE’\text{'OTIDE'}$

String handling operations in a programming language Questions